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J. S. ELLIOTT. GEAR FOR GAS INDIGATORS.

No. 31,791. Patented Mar. 26, 1861.

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UNITED STATES PATENT JOSEPH S. ELLIOTT, OF PHILADELPHIA, PENNSYLVANIA.

GEARING FOR GAS-METERS.

Specification of Letters Patent No. 31,791, dated March 26, 1 861.

T 0 all whom it may concern:

Be it known that I, Josnrrr S. ELLIOTT, of the city .of Philadelphia,in the State of Pennsylvania, have invented a new and improved Gearing for Gas-Meters; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which Figure 1, represents the front, F 2 the rear, and Fig. 3, the bottom-edge, of a gasmeter indicator having my improved gearing applied thereto; like letters, when on the different figures, indicating the same parts.

The nature of my invention consists in the application to gas meters, of gearing constructed, and arranged to operate in combination with openings in the face plate, substantially in the manner hereinafter described; whereby the registering apparatus is rendered more simple and perfect, and the usual liability to errors in ones reading off the amounts indicated almost entirely obviated.

In the drawings A is the front, or faceplate, of the indicator; B and B the frameplates, soldered thereto, for the purpose of supporting the gearing; C, the prime or first driving wheel, and D, its driven wheel; E, the second driver, and F, its driven wheel; G, the third driver, and H, its driven'wheel; I the fourth driver, and K, its driven wheel; L, the fifth driver and M, its driven wheel; N, O, P, Q, (dotted lines) are the respective figure-plates, and 1, 2, 4 the openings in the face-plate (A) through which the ures are seen-the two ciphers a, at the right of the plate (0), being stationary indicators of the hundreds, or complements of the fingers on the said plate. The prime driver (C) is intended to be connected, in any suitable manner, with the usual measuring wheel or valves of the meter, and has two teeth 5-5, fixed radially and diametrically opposite to each other, in its periphery; while each of the four other drivers (E, G, I, L) has but one tooth 6. These teeth and 6,) are each fixed so as to project slightly beyond the periphery of its respective wheel, from a slot or recess 7, in the same. The teeth 8, of each of the driven wheels (D, F, H, K, M,) are arranged to project in pairs,ten in number, around from ,the peripheries of the samethus leaving the equidistant or uniform spaces 9, between each pair of double tee h of each wheel.

The pairs of driven and driving wheels (ED), (F G), (H I), and (K L), are each fixed upon their respective axles, and arranged together so that by operating the prime wheel (C), the required periodical motion will be successively given to the re spective pairs from C, to M iuclusivethe peripheries of the driving. being nearly in contact with the teeth of the driven wheels, respectively.

The figure-plates, or disks, 0, P, Q, are respectively fixed to the axles of the pairs of wheels (H 1,) (K L,) and wheel (M); and as each of the said disks has ten numbers, corresponding in positions with the ten pairs of teeth 'on the said wheels, whenever either of the said carriers are moved, any immediately succeeding number on the disks, respectively, will be brought opposite the holes 2, 3, or 4, and there be held securely from further rotation, until the teeth of the respective driver again comes around and interlocks or gears with the next succeeding pair of teeth in the carrier. The figure disk, N, is fixed to the shaft of the prime wheel (C), and has five numbers arranged thereon to indicate the smallest amounts.

It will be perceived that, as the driving and the driven wheels are in gear with each other only once during each rotation of the driver, excepting only the prime mover (C which gears with its driven wheel (D) twice during each rotation,the friction is reduced to the smallest possible amount; and also that, as the driving wheels, and of course the figure disks, cannot move or be moved at any other time than when period ically operated by the drivers, as described, and all the movable figures being covered except those indicating the whole amount of gas passed through the meter, there can be no probability of any ones mistaking the amount, in reading therefrom.

Having thus fully described my invention in the manner described and for the purpose and pointed out its utility, What I claim as specified.

neW and desire to secure by Letters Patent is, J. S. ELLIOTT.

The application to gas meters of the gear- Vitnesses: 5 ing described; the same being constructed BENJ. MORISON,

andarranged to operate in combination with JAMES R. OLDDEN,

the openings in the face-plate, substantially JAMES MOCAHEN. 

